One of the attractions of the modern personal or home computer is its ability to provide highly detailed graphics displays, usually in colour, and to produce a wide range of sounds. These facilities are, of course, very important for one of the main uses of home computers: playing various types of video game. The graphics capabilities, however, are not limited to use for games. They can also provide diagrams and displays for business and educational use. It is also possible to turn the computer into a form of automated drawing board, and (if a suitable printer or plotter is available) to produce quite acceptable drawings or diagrams on paper. Finally, of course, computer graphics displays may be used purely as an art form.